Lens-measuring instrument.



' A. H. MIGIIELSEN. LENS MEASURING INSTRUMENT. ArPLIoATIoN FILED SEPT.a, 190s.

917,097. Patented Apr.6,19o9;

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no. enges-'7.

Application led September 8, 1968.

i all tri/tom 'it may concern.'

it known that ANTON l. MicnnnsEN, a citizen ol' the United States,residing at Chicago, county ol' Cook, and State ol lllinois, haveinvented certain new and uselul improvements in Lens-llleasuringinstrudents, ol' which the following is a fpoci'licfm tion.

My invention relates to improvements in lens-'measuring instrun'ients,the object being to construct an instrument by the use oi' the locallength ol cylindrical and spherical lenses may be obtained by directreading ol' a suitably graduated dial.

A further bjcct is to provide a mechanism which n'iay be readilu securedin an ordinary I fch-c ier ohjects will appear hereinafter. My inventionconsists certain details ol' Atruction and arrangements ol parts allwill be hereii'iai'ter l'ully described and particularly pointed out inthe claims.

My invention will be more readily' understood by rele-rence to theaccompanying drawings l'orining a part of this specification, and inwhich,

Figure l is a perspective view ol my iinproved device having the generall'orin oi a watch, `Fig. 2 is an elevation with the crystal and dialremoved showingI the movable parts Oi' the mechanism in their normalpositions, Fig. 3 is a similar view showing the positions oi" themovable parte when acted upon by a lens, and Fig. Ll is a detailelevation.

Referring now to the drawings, l indicates an ordinary watch-case and Zthe crystal thereol. A block 3 is inserted in one side of the case l andsecured by soldering or in any suitable manner. The block 3 is tapped toreceive threaded pins or points 4, so that either one or both oi" thesepins may be adjusted and the pins may be adjusted from the outside olthe case l. By giving one of the pins 4 a slight turn, the wholemechanisni may be adjusted so that the dial pointer will register'accurately. The movable point 5 is slidably mounted in the block 3 andis normally in the outermost position as shown in Fig. 2. rlhe point 5is provided with a head 7 which at all times engages a lever S. Tf Y 1f. y Y A When depressed by a lens o the nead 7 integral with the point 5nieves the lever 8 which is pivcted on a screw Q. iin upwardly eX-tending lip 10 is provided on thelever 8 to Specification of LettersPatent.

f engage the head 7.

with and rotates a segment-gear ll, and the Patented April 6, 1909.

Serial No. I251,950.

The lever 8 contacts latter meshes with and rotates a pinion l2. Thedial pointer 13 and the pinion l2 are secured to the saine central arbori4. rlie hair-spring l5 is connected to the arbor 14 in the usual mannerand to the bridge 16 by nie-ans olA the pin 17 The bridge lo is securedin the case l by means ol' the screw i8, and is broken away to exposethe pinion i2. The block 3 is provided with a downwardly curved portion19 which 'l'orins a stop to hifiiit the Vmovennent ol' the lever 8 inone direction and the end 2O ol' the gear il lornis a stop to abut thelever 8 and limit its movement in the opposite direction.

The segment-gear l l 1`s provided with a tail piece ll/ having acam-surface 21 generated upon its edge-into suoli a forni as to causethe dial pointer 13 to register uniformly on the dial when saidcam-surface is acted upon. by the lever S. The segment-gear l] ispivoted on the screw 22, and its two eX- treme positions are shown inFigs. 2 and The lever 8 is slightly curved throughout its length and itsfree end S is turned sharply inward to engage the cam 2l and to archover the end 2O of the gear to permit suiiicient movement of said gear.

The case containing the crystal 2 may be snapped over the ilange 23 asin the usual construction of watch-cases. A ca 24 is provided to protectthe points l an 5, and is adapted to press securely over said points.

While l have shown what l deem to be the preferred form of my device, ldo not wish to he limited thereto, as there might be many changes madein the details of construction and arrangement of parts withoutdeparting from the spirit of my invention.

Having described my invention what l claim as new and desire to secureby Letters Patent, is:

l. ln a lens measure, in combination with a suitable oase, relativelylined and movable pins mounted in said case, a curved lever suitablypivoted in said case and adapted to be engaged and moved by said movablepin, a segine1it-gear in the saine plane with said lever and providedwith a tail-piece having a cani-surface, the free end oi said leverbeing turned inwardly to engage said cam-surface and clear said gear andadapted to rotate the saine, a pinion meshing with said gear, a dialpointer securely connected with said pinion,

and a suitable spring for yieldingly holding the parts in normalposition, substantiallyv as described. v

2. In a lens measure, a oase in combination with a pair of Xed pins anda movable pin mounted therein, a pivotally mounted lever, said movablepin engaging said lever, a segment-gear having a tail piece, the freeend of said lever being turned inwardly to engage said tail' piece andto aroh over said gear, a pinion meshing with said gear, a dial ointermovable therewith, a spring for yie dingly holding the parts in normalposition, a stop for limiting the movement in one direction and one endof said segment-gear Constituting a stop to engage said lever and limitits movement in the opposite direction, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

ANTON II. MICI-IELSEN.

I/Vitnesses:

JANET E. HOGAN, ANNA L. EKVALL.

